Spark-arrester



.. B NUTTI'NG.

SPARK ARRESTER. APPLlCATiON FILED APR.16. 1920. 1,364,793, Patented Jan. 4, 1921.

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3 O a M t 1 Va 6mm WILLIAM BUCKRIDGE NUTTING, or ron'rtmvn, OREGON.

SPARK-ARRESTER.

Specification of Letters Patent.

Patented Jan. 4, 1921.

Application filed April 16, 1920.. Serial No. 374,379.

To all whom it may concern: v

Be it known that I, IVILLIA B. NUTTING, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Spark-Arresters; and I do declare the following to be a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and use the same. r

This invention relates to an improved combined spark arrester and smoke consumer.

The object of the invention is to generally improve upon the construction of devices of the above mentioned character by producing one which in addition to other constructional features, includes means for conveying the cinder, smoke, and particles of combustion back to the fire-box, or to some other place of safe deposit.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of the specification and in which like numerals are employed to designate like parts throughout the same:

Figure 1 is a central vertlcal sectional View of a device constructed in accordance with my invention.

Fig. 2 is a top plan view thereof.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 1 designates a smoke stack, either of a furnace or of a locomotive. In most instances my device will be used in connection with a locomotive smoke stack.

My spark arrester comprises an inverted frusto-conical member 2, into the lower end of which the upper end of the stack 1 extends so as, to form a channel 3 between itself and the inner surface of the member 2. During the operation of the device some of the particles will be deposited in this channel, and will be permitted to escape therefrom through the openings 4 in the member 2. Disposed within and carried by the member 2 are upper and lower, spaced, truncated cones 5 and 6 respectively. The lower cone is of a diameter substantially equal to that of the smoke stack, and the apex opening thereof is of less diameter than the stack. On the other-hand, the upper cone is of a greater thereof, is a this member.

height and size than the lower cone, and its diameter is slightly larger than that of the stack 1. The apex opening in this cone is very much smaller than the one in the cone 5 with which it is vertically alined. l/Vith this construction it will be seen that the lower edges of the cones 5 and 6 will be spaced away from the inner surface of the member 2 so as to permit the smoke to escape freely and yet prevent the sparks and cinders. These cones may be secured in position in any suitable way, such as for instance, by means of metal straps 7. I

Connected to the apex of the upper cone 6 so as to communicate with the apex opening discharge pipe 8, which extends downwardly through an opening in the member 2 and thence along the exterior of It is obvious that the purpose of this pipe 8, is to convey the hot cinders and sparks downwardly through it, to a place of safe deposit. While it is not shown, the free end of this pipe may be directed into the fire-box, or it may be extended downwardly and into close proximity to the surface so that the sparks may be deposited there. Inasmuch as the sparks passing upwardly through the cones 5 and 6 will strike the inner attached end of the conveyer pipe, they will cause this portion of the pipe to become intensely heated, consequently, decreasing its life. To guard against this, I thicken the metal at this point as shown at 9. In operation, the smoke containing the sparks and hot cinders, is forced upwardly through the stackl by the exhaust in the usual manner, and after passing out of the stack, the particles are brought into contact, first with the lower cone 5, and then with the upper cone 6. cone 6, the particles are directed against the portion 9 of the pipe 8, from which point they drop by gravity down through the same and are deposited in the fire-box or other place of deposit to which this pipe leads. Some of the particles which do not pass through the pipe 8, will drop down into the channel 3 and escape through the opening-s 4. On the other hand, some of the smoke will escape by means of the space between the lower edges of the cones and the inner surface of the conical member 2.

A spark arrester constructed in accordance with my invention will be found extremely advantageous, in that it will dispose of the hot cinders and sparks and deposit Due to the shape of the them in a safe place so that they will not be blown against wooden structures and set the same on fire. The construction of the device is such that it may be installed on a smoke stack without altering the latter in any way. Then again, I construct the part of the conveyer-pipe that is engaged by the sparks, in such a manner that it will last indefinitely.

From the foregoing description taken in connection wit-h the accompanying drawings, the operation, construction and advantages of the device will be readily understood by persons skilled in the art to which this invention relates.

It is to be understood that the form of my invention herein shown and described is to be taken as a preferred form of the same, and that various minor changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

I claim:

A spark arrester comprising a cylindrical pipe, an inverted frusto-conical member, open at its upper end and provided at its lower end with cylindrical portion through which the pipe extends, and a plurality of circumferentially arranged openings above and adjacent to said cylindrical portion permitting escape of the particles which fall into the pocket formed between the pipe and inner surface of the member, a truncated cone deflector arranged in the member and secured thereto at a point adjacent the center, the base of said deflector being of a diameter approximately the same as the diameter of the pipe, thus forming a space between itself and the inner surface of said member, a second truncated cone deflector secured to the upper portion of the member and extending beyond the upper end thereof, its base being of a greater diameter than that of said pipe, and its apex opening being smaller than the apex opening of the first named deflector, and a discharge pipe secured at its inner end to the upper end of the last named deflector, the opposite end thereof extending downwardly through an opening in the inverted conical member and inwardly and downwardly along the exterior of thelatter.

In testimony whereof I have hereunto set my hand.

WILLIAM BUCKRIDGE NUTTING. 

